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// PCB Board Connectors

SIM Card Full-Size (1FF)

Full-size SIM (1FF, First Form Factor) is the original credit-card-sized SIM card format (85.6 x 54mm) used in early mobile phones before Mini-SIM became standard in the 1990s.

// Specifications
Standard
ETSI TS 102 221 1FF
Dimensions
85.6 x 54mm credit card size
Contacts
ISO 7816 8-pad contact array
Status
Legacy no longer used in phones
Found In
Original 1990s mobile phones, industrial GSM modems
Protocol
ISO 7816 T=0
// Pin Reference Table
Pin Name Function Type
C1 VCC Supply voltage PWR
C2 RST Card reset I/O
C3 CLK Clock BUS
C5 GND Ground GND
C7 I/O Data input/output BUS